I take palladium as example. What is the chemical when we brush the paper and what happens after uv hits ? Does uv disintagrates the chemical in to nanoparticles ? What is the size of the particles before and after the uv treatment ? How they become organized or does it a process happens and free from making groups ? And most importantly is there a way - may be quantum chemistry - to simulate the process per chemical molecule ? There is a free density functional theory nanoparticle software but I am in it for last couple of hours.